These are some great mocs.
For me the best is the Tax Collector's House, full of good details and advanced building techniques, I love the windows and the balcony.
I think that some MOCs deserve a small description.
D. Inês de Castro Coronation is about a well-known Portuguese royal love story. You can see the story at wikipedia (http://en.wikipedia.org/wiki/In%C3%AAs_de_Castro). I don't know how Hollywood didn't make a movie about this yet
The Return of King Sebastiao is about a Portuguese legend that also you can see at wikipedia here: http://en.wikipedia.org/wiki/Sebastian_of_Portugal (the legend section). So I tried to do something opposite to the D. Inês de Castro MOC. Something simple (I only use four types of elements beside the minifig and horse) and ironic (I use the Timmy head to symbolize the king, and you can read the wikipedia article to know the idea). Using white plates 1x4 for the fog was one of the funniest things that I ever made with LEGO
Pursuit Into The Underworld has a lovely chilling effect and is a wonderful MOC, drawing you in rather than jumping out at you and hinting at more for the eye. Great work!
These are all very nice creations. I especially like Pursuit Into the Underworld. The use of slopes around the edges is cool and gives it a unique feel, and the way the white structure contrasts with the landscape is very neat.